Shulou(Shulou.com)06/02 Report--

This article mainly introduces how centos7 unloads its own jdk and reinstalls it. It has certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let Xiaobian take you to understand it together.

After installing centos7, I found that it comes with openjdk

[root@centos ~]# java -versionopenjdk version "1.8.0_242"OpenJDK Runtime Environment (build 1.8.0_242-b08)OpenJDK 64-Bit Server VM (build 25.242-b08, mixed mode)

Because the openjdk that comes with it may cause some unnecessary problems, start the following operation

1. uninstall openjdk

Use `rpm -qa| grep jdk`or`rpm -qa| grep java`command query comes with jdk

Use the command `rpm -e --nodeps system comes with the jdk file name` delete the yellow box up four, the other three do not move

2. Install your own JDK.

I use jdk-8u231-linux-x64.tar.gz here

Unzip to the directory you want to install

[root@centos ~]# tar -xf jdk-8u231-linux-x64.tar.gz -C /opt/lft/

Then configure the environment variable vi /etc/profile

export JAVA_HOME=/opt/lft/jdk1.8.0_231/export PATH=$PATH:$JAVA_HOME/bin

Finally, make the configuration work, and then look at the O no OK, and that's it.

[root@centos jdk1.8.0_231]# source /etc/profile[root@centos jdk1.8.0_231]# java -versionjava version "1.8.0_231"Java(TM) SE Runtime Environment (build 1.8.0_231-b11)Java HotSpot(TM) 64-Bit Server VM (build 25.231-b11, mixed mode) Thank you for reading this article carefully. I hope that the article "How to uninstall and reinstall centos7" shared by Xiaobian will be helpful to everyone. At the same time, I hope that everyone will support it a lot. Pay attention to the industry information channel. More relevant knowledge is waiting for you to learn!

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